Why a wishbone
The tradition of two people pulling a wishbone and the winner making a wish goes back a very long way. What's stayed is the meaning: hope, and a bit of luck on your side. It makes it one of the easier symbols to give — it isn't romantic, isn't religious, and doesn't require you to know anything about their beliefs.
That's why it lands well for an exam, a driving test, a job interview, a house move, or someone starting university. Occasions where you want to say good luck and mean it.
Why the necklace rather than the earrings
The necklace is the more obvious gift, and the more legible: the wishbone reads clearly at the collarbone, so the meaning arrives without explanation. The earrings are the subtler half of the pair — from a distance they read as a simple V.
Why it lasts
Stainless steel with 18K gold plating. It won't tarnish, which matters for a piece given to mark a moment someone might want to keep for years.